Henry s



H. I. AND J. 1. KING. HOISTING MACHINE- APPLlCATION FILED MAY 6. 1918.

1 ,3 1 5,970. Patented Sept. 16, 1919.

M 34 0 33 if UNITED STATES PATENT OFFICE.

HENRY J. KING AND JOHN J. KING, OF EAST PROVIDENCE, RHODE ISLAND.

HDISTING-MACHINE.

Specification of Letters Patent. Patented Sept, 16 1919,

Application filed. May 6, 1918. Serial No. 232,710.

To all whom. it may concern:

Be it known that we, HENRY J. KING and JOHN J. KING, both citizens ofthe United States, residing at East Providence, in the county ofProvidence and State of Rhode Island, have invented certain new and usefulImprovements in Hoisting-Machines, of which the following is aspecification.

Our invention relates to hoisting machines having a single rope control.

The essential ob ects of our invention are to both engage and releasethe load on the drum by the manipulation of a single rope in a uniformdirection; to increase the grip of the driving wheel upon the drum; toutilize a maximum of power in the operation of the machine; to preventdismantling of the machine when the frictional driving wheel becomesworn; and to attain these ends in a simple structure of great strengthand comprising a minimum of parts.

To the above ends essentially our inven* tion consists of such parts andcombinations of parts as fall within the scope of the appended claims.

In the accompanying drawing which forms a part of this specification-Figure 1, is a front elevation of a hoisting machine which embodies ourinvention,

Fig. 2, a section on line 2-2 of Fig. 1, and

Fig. 3, a section on line 3-3 of Fig. 2.

The framework of our machine may be of any construction best adapted tocarry the operating parts. In the form thereof herein shown it comprisesfront and back castings 4 and legs 5. The castings at their, front endsare connected by a rod 6. Extending transversely of the machine is adrum shaft 8, fast upon the ends of which are eccentric bushings 10journaled in openings 11 in the castings. Loose on the shaft is a drum13 adapted to carry the coils of hoisting rope. Integral with one end ofthe drum or attached thereto by bolts 15 is the hub 16 of a wheel uponwhose spokes or web 18 is a. flange 19. In the present instance spacingcollars 21 and 22 respectively are located on the shaft intermediate thedrum and castings. i

At the rear ends of the walls or castings are slots v24. to looselyreceive a rod 25 retained by end nuts26 and washers 27. Adjustment ofthe rod in the slots is aflordedby set screws 28 in the ends of thewalls engaging the rod. Upon the latter is a spacing sleeve 30 engagingthe frame walls at its end. The sleeve has a squared portion 32 embracedby lugs 33 on a brake shoe 34, whichlugs are connected at theirprojecting ends by a screw 35.

In the front wall of the frame is an eccentric steel bushing 36 having aflange 37 upon its front and through which pass screws 38 received inthreaded openings 39 in the Wall. The bushing, which is preferably ofsteel, projects inwardly beyond the wall, and within this bushing is ashaft 41 driven from any convenient source of power, such as a motor. Inthis instance there is a bearing sleeve 42 fast in the bushing. Fast tothe driving shaft 41 is a driving wheel, pulley, or roll 43 having itscentral portion recessed to loosely receive the inner end of the bushing36. In this instance a bearing sleeve 45 is fast in this sleeve. Theroll has a peripheral recess 46, rectangular in cross section, formingend flanges 47 through which pass bolts 48, which traverse and re tain afriction facing ring 49 seated in the recess 46. This ring or sleeveconstitutes a frictional surface, and is compound of tar and fiber. Thefiber is preferably paper or straw. The described ring is locatedadjacent to and parallel with the inner face of the flange 19 with whichit cooperates.

Fastened to the front' bushing 10 by screws 50 or otherwise, is anoperating arm or lever 52 provided with an intermediate bend 53, andcarrying near its outer end a slidable weight 54 adj ustableby set screw55. To the outer end of this arm maybe attached an upwardly directedoperating rope, by which the end of the arm may be and usually iselevated.

The operation of our machine is as follows: In the normal position ofrest the counterweight 54 presses the flange 19 against the brake 34. Aslight elevation of the outer end of the arm 52 by virtue of eccentrics10 releases the flange from the brake, and the flange assumes a positionintermediate the brake shoe and the roller, as shown in Fig. 2, in whichposition the drum is released and the coil thereon unwinds. A second orfurther elevation o-fthe arm 52 throws the flange into contact with themeniber 13, and the latter rotates the drum to wind up the rope andelevate the load.

When the face 49 of the wheel 43 becomes worn it is only necessary toadjust the bushing 36. This is performed byremoving the screws 38 in theflange, and turning the flange a step, and then reinserting the screws.'Ihe eccentric form of the bushing 36 thus serves to place the wheel 43nearer the flange 19.

It will be observed that by virtue of the location of the driving wheel43to contact with the concave face of the flange rather than with theconvex face there is afforded a much greater area of frictional contact,thus increasing the power of the machine and preventing slippage. Itwill be observed that by virtue of our ad ustment of the wheel 43, thelife thereof is very materially extended.

We claim:

1. In a hoistifPg machine of the type set forth, the combination withthe frame, of a drum shaft in the frame, eccentric bushings on the shaftin the frame, a winding drum loose on the shaft, a wheel fast to the endof the drum, a peripheral flange on the wheel,

a driving shaft, a friction driving roll fast to the driving shaftadjacent the concave face of the rim, a brake shoe in the frame adjacentthe convex face of the rim, an operatlng lever fast at one end to thedrum shaft, and a counterweight slidably mounted I on' the lever.

2. In a hoisting machine of the type set forth, the combination with theframe of an oscillatory drum shaft in the frame, eccentric bushings inthe frame fast to the shaft, a drum loose on the-shaft, a wheel rigidwith the drum, a peripheral flange on the wheel,

signatures.

HENRY J. KING. JOHN J. KING.

